Computer cooling fan



FIG. 1 is a top, front perspective view of the computer cooling fan showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a bottom plan view thereof, the top being a mirror image;

FIG. 4 is a side elevational view thereof, as seen from the right of FIG. 1. 

The ornamental design for a computer cooling fan, as shown and described. 